What is CVE-2020-8086?

CVE-2020-8086 is a critical-severity vulnerability in Prosody Mod Auth Ldap, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2020-01-28.

How severe is CVE-2020-8086?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Prosody Mod Auth Ldap

CVE-2020-8086

The mod_auth_ldap and mod_auth_ldap2 Community Modules through 2020-01-27 for Prosody incompletely verify the XMPP address passed to the is_admin() function. This grants remote entities admin-only functionality if their username matches the username of a local admin.

Vulnerability class: Broken Access Control

Published 2020-01-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

hg.prosody.im/prosody-modules/log/tip/mod_auth_ldap/mod_auth_ldap.lua (Third Party Advisory)
hg.prosody.im/prosody-modules/log/tip/mod_auth_ldap2/mod_auth_ldap2.lua (Third Party Advisory)
prosody.im/security/advisory_20200128/ (Vendor Advisory)
www.debian.org/security/2020/dsa-4612 (vendor-advisory, Third Party Advisory)
seclists.org/bugtraq/2020/Feb/5 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8086?: CVE-2020-8086 is a critical-severity vulnerability in Prosody Mod Auth Ldap, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2020-01-28.
How severe is CVE-2020-8086?: Critical severity. CVSS v3 base score is 9.8 out of 10.